Display and vehicle display device

Abstract

To miniaturize a display unit and a vehicular display device.SOLUTION: A backlight unit 5 emits a display image projected onto a windshield 103 provided in a vehicle 100 as display light. The backlight unit includes: a lens 40 having a lens body 41 and a first support portion 43 protruding from an edge portion of the lens body 41; and a case 70 that has a support portion fitting space R capable of housing the first support portion 43 and holds the lens 40 by fitting the first support portion 43 into the support portion fitting space R.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a display device and a vehicle display device. [Background technology]

[0002] In recent years, some vehicles, such as automobiles, are equipped with a vehicle display device such as a head-up display (HUD). The vehicle display device projects a display image displayed on a display device onto a windshield, a combiner, or the like via an optical system such as a reflecting mirror, allowing the driver to view the image as a virtual image. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-160754 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional vehicle display devices, when assembling a lens, positioning holes are provided in the two support parts of the lens, and the lens is assembled by fitting them into positioning pins provided in the case. However, it is necessary to secure an area equal to the size of the positioning holes in the lens support parts, and securing this area leads to an increase in the size of the lens.

[0005] The present invention provides a display device and a vehicle display device that can be made smaller. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the display device according to the present invention has the following features. A display device that emits a display image to be projected onto a projection target member provided in a vehicle as display light, A lens body and an outer peripheral edge portion of the lens body protruding froma lens having a first support portion; a case having a space capable of accommodating the first support portion, the case holding the lens by fitting the first support portion into the space; the case does not have a positioning pin inserted into the first support portion, the first support portion teeth , The positioning pin does not have a positioning portion through which it is inserted. , the case includes a first case having a first side wall with an opening, and a second case having a second side wall provided with a mounting surface on which the first support portion is placed, a pair of position restriction portions that restrict a position of the first support portion on the placement surface; the first support portion is disposed in a space between the pair of position restriction portions, When the first case and the second case are combined, the space is defined by the opening, the placement surface, and the pair of position restriction portions. Indicator.

[0007] In order to achieve the above object, the vehicle display device according to the present invention has the following features. The display device described above; an optical component that reflects the display light emitted from the display device, Vehicle display device. [Effects of the Invention]

[0008] According to the present invention, it is possible to reduce the size of the display device and the vehicle display device.

[0009] The present invention has been briefly described above. The details of the present invention will become clearer by reading the detailed description of the invention below in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing a general configuration of a vehicle equipped with a vehicle display device. [Figure 2] FIG. 2 is a schematic diagram showing a general configuration of the vehicle display device. [Figure 3] FIG. 3 is an exploded perspective view of the backlight unit according to the embodiment. [Figure 4] FIG. 4 is an exploded perspective view of the lens. [Figure 5]FIG. 5 is a cross-sectional view of the backlight unit according to the embodiment. [Figure 6] FIG. 6 is an exploded perspective view of a conventional backlight unit. [Figure 7] FIG. 7 is a cross-sectional view of a conventional backlight unit. DETAILED DESCRIPTION OF THE INVENTION

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A display device and a vehicle display device according to embodiments of the present invention will be described below with reference to the drawings.

[0012] As shown in FIG. 1, a vehicle display device 1 equipped with a display is a head-up display device mounted on a vehicle 100 such as an automobile. The vehicle display device 1 is disposed inside an instrument panel 102 in the vehicle 100 and projects a display image onto a windshield 103, which is an example of a projection target. The windshield 103 is semi-transparent, reflecting a portion of incident light and transmitting the remainder. Therefore, the windshield 103 transmits the foreground of the vehicle 100 and reflects the display light L emitted from the vehicle display device 1 as a display image toward the eye point EP of a driver D. The driver D is an occupant of the vehicle 100, particularly the driver, and perceives the display image reflected by the windshield 103 as a virtual image S. The virtual image S is perceived by the driver D as being ahead of the windshield 103. As shown in FIG. 2, the vehicle display device 1 of this embodiment includes a housing 2, two reflecting mirrors 3, a backlight unit 5, and a control unit 7.

[0013] The housing 2 is molded from, for example, synthetic resin and is fixed to a vehicle body (not shown). As shown in FIG. 2, the housing 2 accommodates and supports a backlight unit 5, two reflecting mirrors 3, and a control unit 7 in an internal space 2b. The housing 2 has an opening 2a that communicates between the outside and the internal space 2b. The opening 2a is provided in the housing 2 at a position facing the windshield 103 and is closed by a cover member 6. The cover member 6 transmits display light L that is emitted from the backlight unit 5 and reflected by the two reflecting mirrors 3. The display light L that has transmitted through the cover member 6 is directed toward the windshield 103.

[0014] The two reflecting mirrors 3 are arranged on the optical path of the display light L from the backlight unit 5 to the windshield 103, and reflect the display light L emitted from the backlight unit 5 toward the windshield 103. The two reflecting mirrors 3 are composed of a flat mirror 8, which is an example of an optical component, and a concave mirror 9, which is also an example of an optical component.

[0015] The flat mirror 8 has a flat reflective surface and is disposed at a position facing the backlight unit 5. The flat mirror 8 totally reflects the display light L emitted from the backlight unit 5 toward the concave mirror 9 by the reflective surface.

[0016] The concave mirror 9 has a reflective surface formed of a concave curved surface and is disposed opposite the plane mirror 8. The concave mirror 9 totally reflects the display light L reflected by the plane mirror 8 toward the windshield 103 via the cover member 6. The concave mirror 9 functions as, for example, a magnifying mirror. The concave mirror 9 magnifies and reflects the display image represented by the display light L after reflection by the concave mirror 9 so that the display image represented by the display light L after reflection by the concave mirror 9 is relatively larger than the display image represented by the display light L before reflection by the concave mirror 9.

[0017] The backlight unit 5 is an example of a display device that emits, as display light L, a display image that is visually recognized as a virtual image S by the driver D of the vehicle 100. The backlight unit 5 is configured to include a display panel 55 (see FIG. 3) and a light source (not shown) in a housing having an opening. The backlight unit 5 may be configured to include components such as a condenser lens and a deflector lens. The backlight unit 5 is a display device that emits, as display light, a display image to be projected onto the windshield 103, which is a projection target member.

[0018] The control unit 7 is connected to the backlight unit 5 and controls the backlight unit 5. The control unit 7 is configured, for example, by an IC chip mounted on a substrate, and is driven by power obtained from a battery installed in the vehicle 100.

[0019] 3, the backlight unit 5 includes a lens 40 and a case 70 that houses the lens 40. The lens 40 is made of a material such as glass or transparent resin, and serves to refract and deflect light emitted from a light source (not shown) toward a display panel 55 provided in an upper case 50 (described later).

[0020] The lens 40 includes a lens body 41, a first support portion 43, and a second support portion 45. The lens body 41 has a primary lens function, is rectangular when viewed in the optical axis direction, and deflects light incident from a light source (not shown). The first support portion 43 is an edge portion of the lens body 41 and is a plate-like member protruding from one side. The second support portion 45 is a tab-like member provided on the other side opposite the side on which the first support portion 43 is provided, and has a positioning hole 47.

[0021] The case 70 has an upper case 50 which is a first case and a lower case 60 which is a second case, and the case 70 is completed by combining the upper case 50 and the lower case 60, and the lens 40 is stored inside.

[0022] The upper case 50 has four side walls and is configured in a lid shape. One of the four side walls, a first side wall 51, has an opening 53 formed by cutting out a portion of it. The opening 53 defines a support part fitting space R, which will be described later.

[0023] The lower case 60 also has four side walls and is configured in a box shape. One of the four side walls, a second side wall 62, has a mounting surface 64 extending outward from its upper end. A pair of positioning pins 66 protruding from the mounting surface 64 toward the upper case 50 is provided on both ends of the mounting surface 64. Two ribs 68 are provided on the mounting surface 64 between the pair of positioning pins 66. Furthermore, a positioning pin 69 is provided on the side wall opposite the second side wall 62.

[0024] When assembling the backlight unit 5, the lens 40 is placed inside the lower case 60. At this time, the first support portion 43 of the lens 40 is placed on the mounting surface 64 of the lower case 60, and the pair of positioning pins 66 function as a pair of position restricting portions that restrict the position of the first support portion 43 on the mounting surface 64.

[0025] Furthermore, the positioning pin 69 of the lower case 60 is inserted into the positioning hole 47 formed in the second support portion 45 of the lens 40. The positioning pin 69 functions as a positioning portion that determines the position of the lens 40.

[0026] Thereafter, the upper case 50 is placed over the lower case 60 and the lens 40. An opening 53 is provided in the first side wall 51 of the upper case 50. During assembly, the opening 53 is formed in a position facing the mounting surface 64 of the lower case 60. Therefore, the completed case 70 obtained by combining the upper case 50 and the lower case 60 has a space capable of accommodating the first support portion 43 of the lens 40, i.e., a support portion fitting space R. The case 70 can hold the lens 40 by fitting the first support portion 43 into the support portion fitting space R.

[0027] As described above, according to the backlight unit 5 of this embodiment, the first support portion 43 fits into the support portion fitting space R of the case 70, thereby positioning and holding the lens 40 in the case 70. Therefore, compared to when a positioning hole is provided in the support portion of the lens 40 and the lens 40 is assembled by fitting into a positioning pin provided in the case 70, the area of ​​the support portion can be reduced by the size of the positioning hole. Therefore, since there is no longer a need to secure this area, the lens 40 can be made smaller, and the backlight unit 5 can be made more compact.

[0028] Furthermore, by not providing a positioning hole in the support portion of the lens 40, the moldability of the lens 40 is improved, and the degree of freedom in designing the lens shape is increased. This makes it easier to adopt an optimal shape for improving visibility. Furthermore, it becomes possible to make the lens Fresnel, which was not possible with conventional lenses that have a positioning hole in the support portion. Therefore, by adopting a Fresnel lens, it becomes possible to make the lens 40 even smaller and thinner.

[0029] In this embodiment, the case 70 has an upper case 50 and a lower case 60, and by combining the upper case 50 and the lower case 60, a support portion fitting space R is defined. As a result, by positioning the first support portion 43 of the lens 40 between the upper case 50 and the lower case 60 and combining the upper case 50 and the lower case 60, the case 70 sandwiches the first support portion 43 within the support portion fitting space R. This makes it possible to easily assemble the lens 40 into the case 70.

[0030] In particular, the support part fitting space R is defined by the opening 53, the mounting surface 64, and the pair of positioning pins 66 when the upper case 50 and the lower case 60 are combined. With this configuration, the position of the first support part 43 placed on the mounting surface 64 is restricted by the pair of positioning pins 66, thereby improving the accuracy of assembling the lens 40 to the case 70. In particular, the pair of positioning pins 66 restrict the position of the side end parts of the first support part 43, and can restrict lateral movement of the first support part 43.

[0031] Furthermore, the lower case 60 is provided with a positioning pin 69 that is inserted into the positioning hole 47 of the lens 40. As a result, the upper case 50 and the lower case 60 are combined with each other in a state in which the first support portion 43 on one side of the rectangular lens body 41 fits into the support portion fitting space R and the second support portion 45 on the other side has the positioning pin 69 inserted into the positioning hole 47. This makes it possible to make the lens 40 more compact than when positioning holes are provided in the support portions on one side and the other side of the lens body 41. Note that the positioning pin 69 as a positioning portion may be provided not only in the lower case 60, but also in either the upper case 50 or the lower case 60.

[0032] Furthermore, two ribs 68 provided on the placement surface 64 come into contact with the lower surface of the first support portion 43, thereby stably holding the first support portion 43.

[0033] 4 and 5, two lenses 40 are used in the backlight unit 5 of this embodiment. The two lenses 40 are stacked, and the first support portion 43 of the upper lens 40 is integrated with the first support portion 43 of the lower lens 40, and the second support portion 45 of the upper lens 40 is integrated with the second support portion 45 of the lower lens 40. By using two or more lenses 40, for example, the magnification can be increased, and improved visibility can be expected.

[0034] If multiple lenses 40 are used to improve visibility, there is a concern that the backlight unit 5 will become larger. With this configuration, the lenses 40 can be made smaller, so multiple lenses 40 can be used without increasing the size of the case of the backlight unit 5, leading to improved display quality of the vehicle display device 1. Of course, only one lens 40 may be used.

[0035] 2, the vehicle display device 1 includes at least the backlight unit 5 of this embodiment and optical components that reflect the display light emitted from the backlight unit 5, namely, a flat mirror 8 and a concave mirror 9. This allows the vehicle display device 1 to be made smaller and the display quality to be improved.

[0036] 6 and 7, in the backlight unit 5 of the conventional example, a positioning hole 49 is also provided in the first support portion 43 of the lens 40. Two positioning pins 69 are provided in the lower case 60, and both of the two positioning pins 69 are inserted into the positioning hole 49 of the first support portion 43 and the positioning hole 47 of the second support portion 45, respectively. With this configuration, the lens 40 is held in the case 70.

[0037] In the conventional example, the first support portion 43 is also provided with the positioning hole 49, which increases the size of the first support portion 43, resulting in an increase in the size of the lens 40 and, ultimately, the backlight unit 5. In contrast, in the vehicle display device 1 of the embodiment, the lens 40 is made smaller as described above, which makes it possible to make the backlight unit 5 smaller.

[0038] It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. are possible as appropriate. In addition, the material, shape, dimensions, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as the present invention can be achieved.

[0039] In the above embodiment, the first support portion 43 that fits into the support portion fitting space R is provided on one side of the lens body 41, and the second support portion 45 having the positioning hole 47 is provided on the other side, but the present invention is not limited to this example. The lens 40 may have a support portion that does not have a positioning hole and fits into a space provided in the case 70 on the other side in addition to the one side of the lens body 41.

[0040] Furthermore, in the above embodiment, an example was shown in which the case 70 is completed by combining the upper case 50 and the lower case 60 and the lens 40 is stored therein, but this is not limiting. The lens may be stored inside a case in which the upper case and the lower case are integrated. In this case, for example, a space capable of accommodating the first support portion of the lens is provided in a part of the integrated case, and an opening through which the lens can be inserted is provided on the surface opposite the surface provided with this space. With this configuration, the lens can be inserted into the case through the opening and the first support portion can be inserted into the space, thereby holding the lens in the case.

[0041] Here, the features of the above-described embodiments of the display device and the vehicle display device according to the present invention will be briefly summarized and listed below in [1] to [5].

[0042] [1] A display (backlight unit 5) that emits a display image to be projected onto a projection target (windshield 103) provided on a vehicle (100) as display light, a lens (40) having a lens body (41) and a first support portion (43) protruding from an edge of the lens body; a case (70) having a space (support part fitting space R) capable of accommodating the first support part, and holding the lens by fitting the first support part into the space; Indicator.

[0043] According to the display device having the configuration [1] above, the first support portion fits into the space in the case, thereby positioning and holding the lens in the case. Therefore, compared to when a positioning hole is provided in the support portion of the lens and the lens is assembled by fitting it onto a positioning pin provided in the case, the area of ​​the support portion can be reduced by the size of the positioning hole. Therefore, since there is no need to secure this area, the lens can be made smaller, making it possible to miniaturize the display device.

[0044] Furthermore, by not providing a positioning hole in the lens support portion, the moldability of the lens is improved, and the degree of freedom in designing the lens shape is increased. This makes it easier to adopt an optimal shape for improving visibility. Furthermore, it becomes possible to make the lens Fresnel, which was not possible with conventional lenses that have a positioning hole in the support portion. Therefore, by adopting a Fresnel lens, it becomes possible to make the lens even smaller and thinner.

[0045] Furthermore, if multiple lenses are used to improve visibility, there is a concern that the display will become larger. However, with the above configuration, the lenses can be made smaller, so multiple lenses can be used without increasing the size of the display, leading to improved display quality for vehicle display devices.

[0046] [2] The case has a first case (upper case 50) and a second case (lower case 60), and the space is defined by combining the first case and the second case. [1] A display according to the present invention.

[0047] According to the display having the configuration [2] above, by positioning the first support part of the lens between the first case and the second case and combining the first case and the second case, the cases sandwich the first support part within the space, so that the lens can be easily assembled to the case.

[0048] [3] The first case has a first side wall (51) having an opening (53), The second case has a second side wall (62) provided with a mounting surface (64) on which the first support portion is placed, The placement surface is provided with a pair of position restriction portions (positioning pins 66) that restrict the position of the first support portion on the placement surface, When the first case and the second case are combined, the space is defined by the opening, the placement surface, and the pair of position restriction portions. [2] A display according to the present invention.

[0049] According to the display device having the configuration [3] above, the position of the first support portion placed on the placement surface is restricted by the pair of position restricting portions, so that the accuracy of assembling the lens to the case can be improved.

[0050] [4] The lens body deflects light incident from a light source and has a rectangular shape when viewed in the optical axis direction. the first support portion is provided on one side of the lens body, A second support portion (45) having a positioning hole (47) is provided on the other side of the lens body opposite to the one side, A positioning portion (positioning pin 69) inserted into the positioning hole is provided on either the first case or the second case. [2] A display according to the present invention.

[0051] According to the display device having the configuration [4] above, the first case and the second case are combined with each other in a state where the first support part on one side of the rectangular lens body fits into the space and the second support part on the other side has its positioning part inserted into the positioning hole. This makes it possible to make the lens smaller than when positioning holes are provided in the support parts on one side and the other side of the lens body.

[0052] [5] A display according to any one of [1] to [4]; and optical components (a flat mirror 8 and a concave mirror 9) that reflect the display light emitted from the display device. Vehicle display device (1).

[0053] According to the vehicle display device having the configuration [5] above, it is possible to achieve miniaturization and improvement in display quality. [Explanation of symbols]

[0054] 1. Vehicle display device 2. Case 5 Backlight unit (display) 8. Plane mirror (optical component) 9 Concave mirror (optical component) 40 lenses 41 Lens body 43 1st support part 45 Second support part 47 Positioning hole 50 Upper case (first case) 51 First side wall 53 Opening 60 Lower case (second case) 62 Second side wall 64 Placement surface 66 Positioning pin (position control part) 68 Ribs 69 Locating pin (locating part) 70 cases 100 vehicles 103 Windshield (projected part) L display light R Support fitting space (space)

Claims

1. A display device that emits a display image to be projected onto a projection target member provided in a vehicle as display light, a lens having a lens body and a first support portion protruding from an outer peripheral edge portion of the lens body; a case having a space capable of accommodating the first support portion, the case holding the lens by fitting the first support portion into the space; the case does not have a positioning pin inserted into the first support portion, the first support portion does not have a positioning portion through which the positioning pin is inserted, the case includes a first case having a first side wall with an opening, and a second case having a second side wall provided with a mounting surface on which the first support portion is placed, a pair of position restricting portions that restrict a position of the first support portion on the placement surface; the first support portion is disposed in a space between the pair of position restriction portions, When the first case and the second case are combined, the space is defined by the opening, the placement surface, and the pair of position restriction portions. Indicator.

2. the lens body deflects light incident from a light source and has a rectangular shape when viewed in the optical axis direction; the first support portion is provided on one side of the lens body, a second support portion having a positioning hole is provided on the other side of the lens body opposite to the one side; a positioning portion that is inserted into the positioning hole is provided on either the first case or the second case; The display according to claim 1 .

3. The display device according to claim 1 or 2; an optical component that reflects the display light emitted from the display device, Vehicle display device.

Images